- createEventBus(map?): { 
 map: Map<string, Function[]>;
 emit<T>(type, event?): void;
 off<T>(type, handler?): void;
 on<T>(type, handler): void;
 }
- Parameters- map: Map<string, Function[]> = ...
 
- Returns { 
 map: Map<string, Function[]>;
 emit<T>(type, event?): void;
 off<T>(type, handler?): void;
 on<T>(type, handler): void;
 }
- 事件处理器对象 - map: Map<string, Function[]>
- emit:function- emit<T>(type, event?): void
- Parameters- type: string
- Optionalevent: T
 
- Returns void
 
- off:function- off<T>(type, handler?): void
- Parameters- type: string
- Optionalhandler: ((event) => any)
 
- Returns void
 
- on:function- on<T>(type, handler): void
- Parameters- type: string
- handler: ((event) => any)
 
- Returns void
 
 
别名,创建事件总线